My box is going to be 2.5cf and I need to make one port for 32hz and another for 35hz. Eveyrone is so undecided about what to tune the type r 12" for so I will try both and see which I like better. I need to know how big to make the ports to acheive these hzs in a 2.5cf box. Could someone please help me I dont know much of anything about port design.